JP2020158058A - Seat structure of vehicle - Google Patents

Abstract

To provide a seat structure of a vehicle which can prevent the a seatbelt from being wedged when restoring a seatback from a front-tilting state.SOLUTION: A seatback 11 comprises a striker opening part 20 which is opened toward a side face 16 from a back face 15, a first protrusion 3 and a second protrusion 4. The protrusion 3 protrudes rearward rather than a back face 15 of the seatback 11, and protrudes to a sideway rather than a side face 20. The protrusion 3 is formed below the opening part 20. Also, the protrusion 3 has the utmost rear end part 35 located outside the utmost rear end part 45 of a second protrusion 4 in a vehicle width direction. The protrusion 4 protrudes rearward rather than the back face 15 of the seatback 11. The protrusion 4 is formed above the opening part 20. Also, the protrusion 4 has an inclination face 41 which inclines to the outside in the vehicle width direction from the utmost rear end part 45 and inclines toward a front side. At the restoration of the seatback 11, the seatbelt 7 is separated to a sideway of the seatback 11 by sequentially contacting with the protrusion 3 and the protrusion 4.SELECTED DRAWING: Figure 1

Description

The present invention relates to a seat structure of a vehicle including a retractable seat.

Patent Documents 1 and 2 disclose a foldable seat as a seat provided in an automobile. The foldable seat is provided so that the seat back can be tilted forward from an upright state with respect to the seat cushion. The seat back is maintained in an upright state by fitting the striker provided in the vehicle body into the lock mechanism built in the seat back (Patent Documents 1 and 2).

Patent Document 1 discloses a configuration in which a hook of a lock mechanism is engaged with a striker in a state where a striker (U-shaped bar) is fitted in a hole that opens from the back surface to the side surface of the seat back.

Patent Document 2 discloses that a seatbelt hook for hooking a seatbelt is integrally molded with a striker.

Japanese Unexamined Patent Publication No. 2015-020662 Jikkenhei 05-010129

In the foldable seat, when the seat back is returned from the forward tilted state to the upright state, the seat belt may enter the above-mentioned hole opened in the seat back, that is, the opening for the striker. Further, there is a possibility that the portion of the seat belt that has entered the opening may be bitten by the lock mechanism provided on the seat back and the striker.

Even with the above-mentioned seatbelt hook, if the seatbelt is forgotten to be hooked on this hook or the seatbelt is disengaged from this hook, the above-mentioned seatbelt biting may occur.

Therefore, one of the objects of the present invention is to provide a vehicle seat structure capable of preventing the seat belt from being bitten when the foldable seat is returned to the upright state.

The vehicle seat structure according to one aspect of the present invention is
It is a vehicle seat structure equipped with a seat back that is displaceably supported in a forward-moving state and an upright state.
The seat back
An opening that opens from the back to the side of the seat back and into which a striker portion provided on the vehicle body is fitted.
A first convex portion that protrudes rearward from the back surface of the seat back, protrudes laterally from the side surface, and is provided below the opening.
It is provided with a second convex portion that protrudes rearward from the back surface of the seat back and is provided above the opening.
The first convex portion has a rearmost end portion located outside in the vehicle width direction with respect to the rearmost end portion of the second convex portion in a plan view from the vertical direction.
The second convex portion has a surface that is inclined outward and forward in the vehicle width direction from the rearmost end portion of the second convex portion.

In the above-mentioned vehicle seat structure, the seat belt does not enter the opening of the seat back even if the seat back is rotated from the forward tilted state to the upright state. This is because the seat belt is separated from the opening by the protrusions provided above and below the opening (details will be described later). Such a vehicle seat structure can prevent the seat belt from being bitten by the lock mechanism that locks the striker portion and the striker portion fitted in the opening.

It is a perspective view which shows the seat structure of the vehicle of Embodiment 1, and the state which the seat back is upright. It is a right side view which shows the seat structure of the vehicle of Embodiment 1, and shows the state which the seat back is upright. FIG. 5 is a perspective view showing a state in which a striker portion is fitted into an opening of a seat back in the seat structure of the vehicle of the first embodiment. It is a perspective view which shows the state which the seat back was moved forward in the seat structure of the vehicle of Embodiment 1. FIG. It is a perspective view explaining the contact state between the first convex portion provided in the seat structure of the vehicle of Embodiment 1 and a seat belt. It is a perspective view explaining the contact state between the 2nd convex part provided in the seat structure of the vehicle of Embodiment 1 and a seat belt. It is sectional drawing explaining the contact state between the 2nd convex part provided in the seat structure of the vehicle of Embodiment 1 and a seat belt.

Hereinafter, the seat structure of the vehicle of the present invention will be specifically described with reference to the drawings.
In the figure, the same reference numerals indicate the same names.
In the figure, "FR" is the front of the vehicle, "RR" is the rear of the vehicle, "UP" is the upper part of the vehicle, "LWR" is the lower part of the vehicle, "RH" is the right side of the vehicle, and "LH" is the vehicle. Shown to the left. Hereinafter, they may be simply referred to as front, rear, upper, lower, right, and left.

[Embodiment 1]
The seat structure of the vehicle according to the first embodiment will be described with reference to FIGS. 1 to 7.
1 to 3 show a state in which the seat back 11 is upright, and are, in order, a perspective view seen from the diagonally right rear side of the vehicle, a right side view, and a perspective view seen from the diagonally rear left side of the vehicle.
FIG. 4 is a perspective view of the state in which the seat back 11 is tilted forward as viewed diagonally from the front left of the vehicle.
5 and 7 show a part of the seat back 11, the cover 2 and the seat belt 7 described later. 5 and 6 are perspective views seen from diagonally rear left of the vehicle. FIG. 7 is a cross-sectional view of the seat back 11 and the like cut in a horizontal plane.

(Overview)
The vehicle seat structure 1 of the first embodiment is used for a vehicle including a foldable seat 10 having a seat back 11, a striker portion 60 (FIGS. 3 and 4) provided on the vehicle body 6, and a seat belt 7. Ru. The seat back 11 includes an opening 20 that opens from the back surface 15 to the side surface 16. The striker portion 60 is fitted into the opening 20 (FIG. 3). The striker portion 60 that has passed through the opening 20 is locked to a lock mechanism (not shown) built in the seat back 11. By this locking, the seat back 11 is maintained in an upright state. The seat belt 7 is arranged between the side surface 16 of the seat back 11 and the vehicle body 6 in the rotation locus of the seat back 11 (FIG. 4).

The vehicle seat structure 1 of the first embodiment includes a seat back 11 and a first convex portion 3 and a second convex portion 4 provided above and below the opening 20 of the seat back 11, respectively. These convex portions 3 and 4 prevent the seat belt 7 from entering the opening 20 when the seat back 11 is rotated from the forward tilted state to the upright state.

Hereinafter, first, an outline of the foldable seat 10 and an outline of the vehicle body 6 will be briefly described. Next, the first convex portion 3 and the second convex portion 4 will be described in detail.

(Retractable seat)
As shown in FIG. 2, the foldable seat 10 includes a seat back 11, a seat cushion 12, and a rotation mechanism (not shown) of the seat back 11. The seat back 11 is displaceably supported by the rotation mechanism with respect to the seat cushion 12 in a forward tilted state (FIG. 4) and an upright state.

The foldable seat 10 of this example is a rear seat of an automobile, and includes a plurality of seat backs arranged side by side in the vehicle width direction. Here, the seat back 11 arranged on the right side in the vehicle width direction is mainly shown. Hereinafter, the seat back 11 arranged on the right side will be described as an example. For the left seat back, "right" should be read as "left".

An opening 20 is provided at a corner of the back surface 15 of the seat back 11 and the right side surface 16 (see also FIG. 1). The opening 20 here is provided in the cover 2 described later. The opening provided in the seat back 11 itself (hereinafter referred to as the opening A) is hidden behind the cover 2 and cannot be seen. The opening A is continuously opened from the back surface 15 to the side surface 16, and the striker portion 60 is fitted therein.

In addition, the foldable seat 10 of this example does not have a reclining mechanism and a sliding mechanism. The seat cushion 12 of this example is one and has a size that allows a plurality of occupants to be seated side by side in the vehicle width direction, but may be divided according to the number of occupants. As for the basic configuration of the foldable seat 10, including the rotation mechanism, a known configuration can be used.

(Body)
As shown in FIG. 4, the striker portion 60 is fixed to the vehicle body 6 at a predetermined position. The striker portion 60 of this example is provided at a position where it is automatically fitted into the openings 20 and A of the seat back 11 when the seat back 11 is rotated from the forward tilted state to the upright state.

In the vehicle body 6, the shoulder anchor 67 is fixed at a predetermined position above and to the right of the seat back 11 in the upright state (see also FIGS. 1 and 2). The seat belt 7 is supported by the shoulder anchor 67 with respect to the upright seat back 11 so as to sandwich the upper and right corners of the seat back 11, that is, the right shoulder portion (FIGS. 1 and 1). 2). In addition, a known configuration can be used as the basic configuration of the seat belt 7.

In this example, the vehicle body 6 is provided with a hook 68. The hook 68 is arranged on the side of the seat cushion 12 (not shown in FIG. 4) near the lower side of the vehicle body 6. The hook 68 locks the seatbelt 7 when the seatbelt 7 is not used (when there is no occupant in the rear seat, when the seatback 11 is used in the forward state, etc.). The seat belt 7 is held by the hook 68 by hooking a portion near the tongue plate 78 on the hook 68.

(Convex part)
The seat back 11 of this example includes a cover 2 attached to the seat back 11 so as to cover the opening A of the seat back 11 itself. The cover 2 includes an opening 20 provided so as to communicate with the opening A when the cover 2 is mounted on the seat back 11 (hereinafter, referred to as a cover mounted state). The first convex portion 3 and the second convex portion 4 of this example are provided on the cover 2. Hereinafter, the cover 2 will be described in detail.

<Overview>
As shown in FIG. 1, the cover 2 of this example is a resin molded body having an L-shaped cross section, which is located above the seat back 11 and is arranged from the back surface 15 to the right side surface 16. The cover 2 is provided with an opening 20 so as to divide a ridge line formed by a rear wall portion 25 arranged on the back surface 15 side and a side wall portion 26 arranged on the side surface 16 side. Further, the cover 2 includes a first convex portion 3 and a second convex portion 4. The first convex portion 3 projects rearward from the rear wall portion 25 and laterally (here, to the right) from the side wall portion 26. The second convex portion 4 projects rearward from the rear wall portion 25. In the cover-mounted state, the first convex portion 3 protrudes rearward from the back surface 15 of the seat back 11 and protrudes laterally from the side surface 16, and the second convex portion 4 protrudes from the back surface 15 of the seat back 11. Also protrudes backwards.

<Aperture>
The opening 20 is continuously opened from the rear wall portion 25 to the side wall portion 26 of the cover 2. The size of the opening 20 is adjusted according to the striker portion 60, similarly to the opening A of the seat back 11.

<Convex part>
Hereinafter, the first convex portion 3 and the second convex portion 4 will be described mainly with reference to FIGS. 5 and 6.
The convex portions 3 and 4 are located downward and upward so as to sandwich the opening 20. Further, the convex portions 3 and 4 are provided at positions corresponding to the formation positions of the opening 20 in the cover 2. Specifically, when the cover 2 is viewed in a plan view from the vertical direction, the convex portion 4, the peripheral edge forming the opening 20, and the convex portion 3 overlap each other in the width direction of the cover 2 (the vehicle width direction when the cover is attached). Has a place.

《First convex part: Lower convex part》
The first convex portion 3 provided below the opening 20 has a function of suppressing the seat belt 7 from being displaced toward the opening 20 when the seat back 11 is returned from the forward tilted state to the upright state. .. A description of this function will be described later.

The first convex portion 3 of this example is a triangular pyramid-shaped protrusion. One surface of the triangular pyramid is substantially in contact with the rear wall portion 25. The upper end surface 30 is arranged so that another surface faces upward. A part of the upper end surface 30 is connected to the side wall portion 26 and constitutes a portion protruding laterally from the side wall portion 26. One apex of the upper end surface 30 which is triangular in a plan view from the vertical direction is the rearmost end portion 35 of the convex portions 3. The remaining two surfaces of the triangular pyramid are a surface inclined from the rear wall portion 25 toward the rearmost end portion 35 and a surface inclined from the side wall portion 26 toward the rearmost end portion 35 (also in FIGS. 1 and 2). reference). In this example, the two surfaces are composed of a smooth curved surface 33. A part of the curved surface 33 also constitutes a portion protruding from the side wall portion 26. The convex portion 3 has the upper end surface 30, the curved surface 33, and the rearmost end portion 35.

The rearmost end 35 of the first convex portion 3 is located outside (here, on the right side) in the vehicle width direction from the rearmost end 45 of the second convex portion 4, which will be described later, in a plan view from the vertical direction. It can be said that such a rearmost end portion 35 is arranged at a position where it can easily come into contact with the seat belt 7 located on the side of the seat back 11 when the cover is attached.

The upper end surface 30 of this example is continuously provided on the peripheral edge forming the opening 20. In the cover 2, the size of the first convex portion 3 (for example, the protruding length from the rear wall portion 25 or the side wall portion 26 at the rearmost end portion 35, the width of the convex portion 3, the vertical length of the convex portion 3, etc. ), The arrangement position (position in the width direction, position in the vertical direction, etc.) is adjusted so as to satisfy the following conditions. This adjustment may be performed according to the rotation trajectory of the seat back 11 and the arrangement position of the seat belt 7.
(Conditions) When the seat back 11 is returned from the forward tilted state to the upright state, the seat belt 7 in contact with the first convex portion 3 is rearward of the opening 20 and in the vehicle width direction as the seat back 11 is displaced. Arranged on the outside, i.e. away from the opening 20.

<< Second convex part: Upper convex part >>
The second convex portion 4 provided above the opening 20 has a function of guiding the seat belt 7 to the side of the seat back 11 when the seat back 11 is returned from the forward tilted state to the upright state. A description of this function will be described later.

The second convex portion 4 of this example is a triangular columnar protrusion. One side of the rectangle of the triangular prism is in contact with the rear wall portion 25. The upper end surface 40 is arranged so that one surface of the triangle of the triangular prism faces upward. The ridge line connecting the upper end surface 40 and the lower end surface facing the upper end surface 40 is the rearmost end portion 45 of the convex portions 4. The remaining two rectangular faces are faces that incline from the rear wall portion 25 toward the rearmost end portion 45. One inclined surface 41 is inclined toward the outside (here, to the right) in the vehicle width direction from the rearmost end 45 and toward the front. The other inclined surface 42 is inclined inward (here, to the left) in the vehicle width direction and forward from the rearmost end 45. The convex portion 4 has an upper end surface 40, a lower end surface, inclined surfaces 41 and 42, and the rearmost end portion 45.

The second convex portion 4 of this example is provided at a position separated upward from the opening 20. In the cover 2, the size of the convex portion 4 (for example, the protruding length from the rear wall portion 25 at the rearmost end portion 45, the width of the convex portion 4, the vertical length of the convex portion 4, etc.), the arrangement position (width direction). Position, vertical position, etc.) are adjusted to satisfy the following conditions. This adjustment may be performed according to the rotation trajectory of the seat back 11, the arrangement position of the seat belt 7, and the arrangement position of the first convex portion 3.
(Conditions) When the seat back 11 is returned from the forward tilted state to the upright state, the seat belt 7 comes into contact with the first convex portion 3 due to the displacement of the seat back 11, and then the inclined surface of the second convex portion 4. It is arranged so as to come into contact with 41.

In addition, the cover 2 of this example is provided with two fastening holes 28 in the rear wall portion 25. A fastening member (eg, a bolt or the like, not shown) for fixing the cover 2 to the seat back 11 is inserted into each fastening hole 28. In FIGS. 1 to 4, the fastening hole 28 is omitted. Further, the cover 2 of this example includes a fixing portion 29 (shown only in FIG. 2). The fixing portion 29 is inserted from the side surface 16 of the seat back 11 in the vehicle width direction and fixed to the seat back 11 (details are not shown). The fixing method of the cover 2 can be changed as appropriate.

(Operation to return from the forward state to the upright state)
Next, regarding the vehicle seat structure 1 of the first embodiment, the procedure of the operation of returning the seat back 11 from the forward tilted state to the upright state, the first convex portion 3 and the second convex portion 4 and the seat belt 7 at this time. The arrangement state of and will be described.
The following describes a case where the seat back 11 is returned in a state where the seat back 11 is tilted forward and the seat belt 7 is not locked to the hook 68.

When the seat back 11 is rotated backward from the forward tilted state (FIG. 4), the corners of the back surface 15 and the side surface 16 of the seat back 11 and the portions in the vicinity thereof are seat belts arranged on the side of the seat back 11. Pass near 7. In particular, when the gap between the side surface 16 of the seat back 11 and the vehicle body 6 (the trim 69 attached to the vehicle body 6 in FIG. 7) is narrow, the seat belt 7 easily comes into contact with the seat back 11. For example, the seat belt 7 may be caught below the above-mentioned corner portion of the seat back 11 and come into contact with the seat belt 7 so as to be attached from the corner portion to the back surface 15 (FIG. 5). As a result, the seat belt 7 may enter the opening A of the seat back 11.

In the vehicle seat structure 1 of the first embodiment, the first convex portion 3 and the second convex portion 4 are provided on the back surface 15 of the seat back 11 near the above-mentioned corner portions. Therefore, as shown in FIG. 5, a part of the seat belt 7 contacts the lower part of the corner portion of the seat back 11 and also contacts the first convex portion 3. The rearmost end 35 of the first convex portion 3 is located behind the rearmost end 45 of the second convex portion 4. Therefore, the seat belt 7 first comes into contact with the rearmost end 35 of the first convex portion 3.

When a part of the seatbelt 7 comes into contact with the rearmost end portion 35, the contact portion and the portion in the vicinity thereof are flowed to the right along the shape of the first convex portion 3 (curved surface 33), and the convex portion 3 It is kept in contact with the side of the. As a result, in the seatbelt 7, the portion located above the contact portion with the convex portion 3 is maintained in a state of being separated from the opening 20 to the rear and side by the convex portion 3. That is, the first convex portion 3 prevents the above-mentioned upper portion of the seat belt 7 from being displaced so as to enter the opening 20. In this state, the seat belt 7 has not yet come into contact with the second convex portion 4 (see the alternate long and short dash line in FIG. 7).

When the seat back 11 is further rotated, the portion of the seat belt 7 above the contact portion with the first convex portion 3 is the inclined surface of the second convex portion 4 as shown by the solid line in FIG. Contact 41. The inclined surface 41 of this example is a rectangular flat surface. Therefore, one surface (inner side surface 70) of the seat belt 7 can come into surface contact with the inclined surface 41.

When a part of the seat belt 7 comes into contact with the inclined surface 41, the contact portion is guided so as to flow to the right and forward along the shape of the inclined surface 41 (see also FIG. 6). As a result, in the seatbelt 7, the portion located above the contact portion with the first convex portion 3 is promoted to be laterally separated from the opening 20 by the second convex portion 4.

When the seat back 11 is further rotated, the seat belt 7 is separated from the first convex portion 3 and has no contact point with the first convex portion 3, and the inclined surface 41 of the second convex portion 4 is formed. It will be in a state of having a contact point with. When the seat back 11 is further rotated in this state, the seat belt 7 is swept sideways along the inclined surface 41 and is also separated from the second convex portion 4. As a result, the seat belt 7 is located on the side of the side surface 16 of the seat back 11.

By further rotating the seat back 11, the striker portion 60 is fitted into the opening 20 and the opening A. The striker portion 60 is locked to the locking mechanism via the opening 20 and the opening A. As a result, the seat back 11 is maintained in an upright position.

(Main effect)
Since the vehicle seat structure 1 of the first embodiment includes the first convex portion 3 and the second convex portion 4 on the back surface 15 side of the seat back 11, when the seat back 11 is returned from the forward tilted state to the upright state. It is possible to prevent the seat belt 7 from entering the opening 20 for the striker portion 60. Therefore, in the vehicle seat structure 1 of the first embodiment, even if the seat belt 7 is forgotten to be hooked on the hook 68 and the above-mentioned return operation to the upright state is performed, the seat belt 7 still has the lock mechanism and the striker portion 60. It can be prevented from being bitten by.

In particular, in the vehicle seat structure 1 of the first embodiment, the convex portion 3 having a function of suppressing the displacement of the seat belt 7 toward the opening 20 side and the seat belt 7 of the seat back 11 are used instead of one protrusion. A convex portion 4 having a function of guiding laterally is provided separately. Therefore, the vertical length, the protruding height, and the like of the biconvex portions 3 and 4 can be minimized. Therefore, the vehicle seat structure 1 of the first embodiment can suppress the overhang of the convex portions 3 and 4 toward the vehicle body 6 even when the gap between the side surface 16 of the seat back 11 and the trim 69 is narrow as described above. .. Although the vehicle seat structure 1 of the first embodiment includes the convex portions 3 and 4, the space inside the vehicle interior can be widely used.

Further, the seat structure 1 of the vehicle of this example also has the following effects.
(A) The seat back 11 includes a cover 2 provided with a first convex portion 3 and a second convex portion 4. Therefore, by attaching the cover 2 to the seat back 11, it is possible to easily construct a configuration including the convex portions 3 and 4 having a predetermined shape.
(B) The cover 2 covers the opening A and the like provided on the back surface 15 side of the seat back 11. Therefore, the cover 2 makes it look good.
(C) The upper end surface 30 of the first convex portion 3 is a flat surface continuous with the peripheral edge forming the opening 20. Such an upper end surface 30 functions as a guide when the striker portion 60 is fitted into the opening 20.

Further, since the cover 2 of this example is a resin molded body, the following effects are also obtained.
(1) When the seat belt 7 comes into contact with the cover 2, it is slippery. Therefore, the seat belt 7 is separated from the opening 20 as described above, and easily flows to the side of the seat back 11.
(2) The cover 2 is lightweight.
(3) The cover 2 can be easily molded into a predetermined shape by injection molding or the like, and is excellent in manufacturability.

Although the seat back 11 on the right side has been described in the first embodiment, the seat back on the left side can be provided with the same configuration.

The present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.
For example, the following changes can be made to the first embodiment.
(1) The cover 2 is omitted, and the first convex portion 3 and the second convex portion 4 are provided on the seat back 11 itself. In this case, the number of parts is small.
(2) The area of the cover 2 that covers the back surface 15 of the seat back 11 is larger than that of the first embodiment. For example, the cover 2 may cover the entire back surface 15. Such a cover 2 also has a function of protecting the back surface 15 in the forward tilted state.

1 Vehicle seat structure 10 Foldable seat, 11 Seat back, 12 Seat cushion 15 Back, 16 Side 2 Cover 20 Opening, 25 Houbi, 26 Side wall, 28 Fastening hole, 29 Fixed part 3 First convex Part, 30 Upper end surface, 33 Curved surface, 35 Rearmost end 4 Second convex part, 40 Upper end surface, 41, 42 Inclined surface, 45 Rearmost end 6 Body, 60 Striker part, 67 Shoulder anchor, 68 Hook 69 Trim 7 seat belt, 70 inner surface, 78 tongue plate

Claims (1)

It is a vehicle seat structure equipped with a seat back that is displaceably supported in a forward-moving state and an upright state.
The seat back
An opening that opens from the back to the side of the seat back and into which a striker portion provided on the vehicle body is fitted.
A first convex portion that protrudes rearward from the back surface of the seat back, projects laterally from the side surface, and is provided below the opening.
It is provided with a second convex portion that protrudes rearward from the back surface of the seat back and is provided above the opening.
The first convex portion has a rearmost end portion located outside in the vehicle width direction with respect to the rearmost end portion of the second convex portion in a plan view from the vertical direction.
The second convex portion has a surface that is inclined outward and forward in the vehicle width direction from the rearmost end portion of the second convex portion.
Vehicle seat structure.

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